Gun Lake Area Sewer & Water Authority

NPDES permit MI0042501 · Minor POTW · administratively continued, expires 2025-10-01 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2025-10-01 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
1of 12 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 21 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (94)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 6 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Oxygen, dissolved [DO]DAILY MN >= 7.6 mg/L May, Jun, Jul, Aug, Sep, Oct
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr
001Solids, total suspended7 DA AVG <= 30 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Solids, total suspended7 DA AVG <= 45 mg/L Jan, Feb, Mar, Apr
001Solids, total suspendedMO AVG <= 200 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Solids, total suspendedMO AVG <= 300 lb/d Jan, Feb, Mar, Apr
001Solids, total suspended7 DA AVG <= 300 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Solids, total suspended7 DA AVG <= 450 lb/d Jan, Feb, Mar, Apr
001Nitrogen, ammonia total [as N]MO AVG = 6 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 6 mg/L Jan, Feb, Mar
001Nitrogen, ammonia total [as N]MO AVG <= .5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX = 11 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 5 mg/L Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG = 60 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 60 lb/d Jan, Feb, Mar
001Nitrogen, ammonia total [as N]MO AVG <= 5 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]7 DA AVG = 110 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar
001Nitrogen, ammonia total [as N]7 DA AVG <= 50 lb/d Nov, Dec
001Nitrogen, ammonia total [as N]7 DA AVG <= 20 lb/d May, Jun, Jul, Aug, Sep, Oct
001Cyanide [A]MO AVG = 5.3 ug/L all year
001Cyanide [A]DAILY MX report only all year
001Cyanide [A]MO AVG = .05 lb/d all year
001Cyanide [A]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001E. coliMO GEOMN = 130 #/100mL all year
001E. coli7 DA GEO = 300 #/100mL all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]1D <= 2 ng/L all year
001Mercury, total [as Hg]1D <= .00002 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 4 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jan, Feb, Mar, Apr
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 40 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 250 lb/d Jan, Feb, Mar, Apr
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 100 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 400 lb/d Jan, Feb, Mar, Apr
001BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % Jan, Feb, Mar, Apr
001BOD, carb-5 day, 20 deg C, percent removalDAILY MN report only Jan, Feb, Mar, Apr
001Solids, suspended percent removalMINIMUM >= 85 % Jan, Feb, Mar, Apr
001Solids, suspended percent removalDAILY MN report only Jan, Feb, Mar, Apr
SLDSolids, totalMO MIN report only all year
SLDSolids, totalMO AVG report only all year
SLDSolids, totalMO MAX report only all year
SLDArsenic, dry weightMO MIN report only all year
SLDArsenic, dry weightMO AVG report only all year
SLDArsenic, dry weightMO MAX <= 75 mg/kg all year
SLDSelenium, dry weightMO MIN report only all year
SLDSelenium, dry weightMO AVG report only all year
SLDSelenium, dry weightMO MAX <= 100 mg/kg all year
SLDCopper, dry weightMO MIN report only all year
SLDCopper, dry weightMO AVG report only all year
SLDCopper, dry weightMO MAX <= 4300 mg/kg all year
SLDCadmium, dry weightMO MIN report only all year
SLDCadmium, dry weightMO AVG report only all year
SLDCadmium, dry weightMO MAX <= 85 mg/kg all year
SLDNitrogen, total KjeldahlMO MIN report only all year
SLDNitrogen, total KjeldahlMO AVG report only all year
SLDNitrogen, total KjeldahlMO MAX report only all year
SLDMolybdenum, sludge, total, dry weight [as Mo]MO MIN report only all year
SLDMolybdenum, sludge, total, dry weight [as Mo]MO AVG report only all year
SLDMolybdenum, sludge, total, dry weight [as Mo]MO MAX <= 75 mg/kg all year
SLDZinc, sludge, total, dry weight [as Zn]MO MIN report only all year
SLDZinc, sludge, total, dry weight [as Zn]MO AVG report only all year
SLDZinc, sludge, total, dry weight [as Zn]MO MAX <= 7500 mg/kg all year
SLDLead, sludge, total, dry weight [as Pb]MO MIN report only all year
SLDLead, sludge, total, dry weight [as Pb]MO AVG report only all year
SLDLead, sludge, total, dry weight [as Pb]MO MAX <= 840 mg/kg all year
SLDNickel, sludge, total, dry weight [as Ni]MO MIN report only all year
SLDNickel, sludge, total, dry weight [as Ni]MO AVG report only all year
SLDNickel, sludge, total, dry weight [as Ni]MO MAX <= 420 mg/kg all year
SLDNitrogen, sludge, total, dry weight [as N]MO MIN report only all year
SLDNitrogen, sludge, total, dry weight [as N]MO AVG report only all year
SLDNitrogen, sludge, total, dry weight [as N]MO MAX report only all year
SLDMercury, sludge, total, dry weight [as Hg]MO MIN report only all year
SLDMercury, sludge, total, dry weight [as Hg]MO AVG report only all year
SLDMercury, sludge, total, dry weight [as Hg]MO MAX <= 57 mg/kg all year
SLDPotassium, sludge, total, dry weight [as K]MO MIN report only all year
SLDPotassium, sludge, total, dry weight [as K]MO AVG report only all year
SLDPotassium, sludge, total, dry weight [as K]MO MAX report only all year
SLDPhosphorus, sludge, total, dry weight [as P]MO MIN report only all year
SLDPhosphorus, sludge, total, dry weight [as P]MO AVG report only all year
SLDPhosphorus, sludge, total, dry weight [as P]MO MAX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states